What's on TV Thursday: The series finale of 'Gotham' on Fox

Penguin and The Riddler (Robin Lord Taylor, left, and Cory Michael Smith) are are up to their old tricks in the series finale of "Gotham" on Fox. (Fox)

SERIES

The Big Bang Theory Koothrappali (Kunal Nayyar) is worried that people won't take him seriously in his own field after publishing a paper that suggests he may have discovered alien life. Also, Leonard (Johnny Galecki) wants to be the principal investigator on a plasma physics study. Jim Parsons, Kaley Cuoco, Simon Helberg, Melissa Rauch and Mayim Bialik also star in this new episode of the smart comedy. 8 p.m. CBS

Supernatural Sam, Dean and Castiel (Jared Padalecki, Jensen Ackles, Misha Collins) are swept up in another epic battle, while Jack (Alexander Calvert) feels overwhelmed by the conviction that everyone is lying to him in the season finale. 8 p.m. CW

Gotham The series finale of this atmospheric comic book-inspired crime drama flashes forward 10 years into the future, as Bruce Wayne (David Mazouz) returns to his home turf for the opening of the new Wayne Tower. Ben McKenzie, Robin Lord Taylor, Cory Michael Smith and Donal Logue also star. 8 p.m. Fox

Young Sheldon Unhappy that school funds are going toward football rather than academics, Sheldon (Iain Armitage) decides to run for class president in this new episode of the comedy spinoff. Lance Barber, Montana Jordan, Zoe Perry and Raegan Revord also star. 8:30 p.m. CBS

Mom Bonnie and Tammy (Allison Janney, Kristen Johnston) revisit childhood memories on a trip to their old foster home while Christy and Jill (Anna Faris, Jaime Pressly) have a date with two guys from their meetings. 9 p.m. CBS

Brooklyn Nine-Nine On an episode that takes place in real time, Jake (Andy Samberg) and the squad must track down a hacker who has infiltrated the precinct’s servers. Stephanie Beatriz, Dirk Blocker and Joel McKinnon Miller also star. 9 p.m. NBC

The Orville In the season finale Seth MacFarlane’s science-fiction dramedy, the ship and crew are reeling from the fallout of young Kelly’s (Adrianne Palicki) past decision. Jessica Szohr also stars. 9 p.m. Fox

Top Gear Matt LeBlanc, Chris Harris and Rory Reed return as this international hit show for car enthusiasts launches its 26th season. James Marsden guest stars in the season premiere. 9 p.m. BBC America

Project Runway The designers are invited to a Brandon Maxwell photo shoot featuring Karlie Kloss in this new episode. 9 p.m. Bravo

Abby’s Abby (Natalie Morales) finds a letter from her estranged father in a pile of unopened mail. Nelson Franklin, Neil Flynn, Jessica Chaffin and Leonard Ouzts also star in this new episode of the comedy. 9:30 p.m. NBC

The American Farm With the crops in the ground and hundreds of thousands of dollars on the line, farmers must protect their investment when their fields are threatened by a variety of pests in this new episode. 10 p.m. History

SPECIALS

I Was a Child Bride: The Untold Story Elizabeth Vargas interviews women who were children when they were forced into marriage and, subsequently, had children of their own while other kids were just growing up in this new two-hour documentary. 9 p.m. A&E

Rookie Moonshot: Budget Mission to the Moon This new special charts the journey of the SpaceIL Robotic Spacecraft as it attempts to become the first privately funded vehicle to make a lunar landing. 9 p.m. National Geographic